Hint

Answer

Eel, yak, asp, boa, wren, bull, cow, ape, seal, ant, vole, collie, fox, bat, ox, lion, owl (plus char, hart and hind for three bonus points, but these are more difficult. Char is a fish, related to trout and/or salmon and the hart is a kind of deer, while the hind is either a fish or a deer, depending on your usage.)Hide